Trivial File Transfer Protocol
IETF standards documentation

RFC Number
Title
Published
Author
Obsolete and Update Information
RFC 783
The TFTP Protocol (Revision 1)
June 1981
K. Sollins
Obsoleted by - RFC 1350
RFC 906
Bootstrap Loading using TFTP
June 1984
Ross Finlayson
-
RFC 951
Bootstrap Protocol
Sep.1985
Bill Croft
Updated by RFC 1395, RFC 1497, RFC 1532, RFC 1542, RFC 5494
RFC 1350
The TFTP Protocol (Revision 2)
July 1992
K. Sollins
Updated by RFC 1782, RFC 1783, RFC 1784, RFC 1785, RFC 2347, RFC 2348, RFC 2349
RFC 1782
TFTP Option Extension
March 1995
G. Malkin
Obsoleted by - RFC 2347
RFC 2131
Dynamic Host Configuration Protocol
March 1997
R. Droms
Updated by RFC 3396, RFC 4361, RFC 5494, RFC 6842
RFC 2347
TFTP Option Extension
May 1998
G. Malkin
-
RFC 2348
TFTP Blocksize Option
May 1998
G. Malkin
-
RFC 2349
TFTP Timeout Interval and Transfer Size Options
May 1998
G. Malkin
-
RFC 5505
Principles of Internet Host Configuration
May 2009
B. Aboba
-
RFC 7440
TFTP Windowsize Option
Jan 2015
P. Masotta
-

Question: Was is the latest IETF standards documentation and when was it released?
Answer: The TFTP Windowsize Option (RFC 7440) was published in January 2015.